* subversion/libsvn_subr/config.c
  (svn_config_set): replace plain assertion with our macros
                    as we have better control over them

Suggested by: brane

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1534110 13f79535-47bb-0310-9956-ffa450edef68